Question calling a function of a smart contract

Moralis General
#1

I have this working for the transfer event (don’t worry it’s on Ropsten)


      let options = {
        type: "erc20",
        tokenId: "",
        amount: Moralis.Units.Token(ntoken, 18), 
        receiver: eth2,
        contractAddress: "0x294e1BFd460053C77B991A3ed22482060b54278A"}
  
        let result = await (Moralis.Web3 as any).transfer(options);
        if(result){... etc....

I need an example of how to call a simpler method like totalSupply or BalanceOf - (the standard openzeppelin functions on same contract ? Can I use moralis for this too, ? Or should I use web3?

#2

you can use runContractFunction for that https://docs.moralis.io/moralis-server/web3-sdk/native#runcontractfunction

executeFunction would also work but it will need web3 to be enabled

#3

this will probably work. I still can’t figure out where to get the ethAddress of signed into metamask account

#4

there should be various ways to get that address, do you have access to a web3 or etherjs instance?

#5

doesnt this

 const Web3Api = useMoralisWeb3Api();

get me that instance ?

Because metamask isn’t injectedWeb3 anymore right ? Doesn’t this mess things up ?

#6

what is not web3, that is web3api

#7

So I will have to add another library , just to get users eth address ?

#8

Hey if you’re using React, you can use this

cosnt { account } = useMoralis();

to get the current metamask/web3 wallet address connected :raised_hands:

#9

yes ! thanks to you guys both

1 Like
#10 
const { account } = useMoralis();

givesme this error

Property ‘account’ does not exist on type ‘MoralisContextValue’.ts(2339)

and yet all this works fine
const {
authenticate,
isAuthenticated,
logout,
} = useMoralis();

#11

I can get this info from JSON.stringify(user);

{"username":"yMWhe6Tlk2nlTnzg5eIz6CPW5","authData":{"moralisEth":{"id":"0x63a22a955534635e612765a50febfc3759eb81b9","signature":"0x0643a83b6bfdbb1811a5251aa8a15cd44ac4f31c6bee7ec6bb7c5d1ac36540e5110328375e19e702e934040c09b09335d9ce752f600aec22ee25bfe277aa3ca41b","data":"Moralis Authentication\n\nId: raQNzqEd2flUnZWcMplhSZzCBps4cUNeFkgEb1qZ:1643975685827"}},"createdAt":"2021-12-12T05:49:07.313Z","updatedAt":"2022-02-04T11:54:48.957Z","accounts":["0x63a22a955534635e612765a50febfc3759eb81b9"],"ethAddress":"0x63a22a955534635e612765a50febfc3759eb81b9","ACL":{"jaWgBM7QtrssvPBJ5QTjxOJg":{"read":true,"write":true}},"sessionToken":"r:22733931f624a46708ca0fadc594093a","objectId":"jaWgBM7QtrssvPBJ5QTjxOJg"}

Any ideas on how I can extract the ethAddress ?having a tough time

#12

which version of the SDK are you using?

#13

I do not even know how to find that info.

#14

I got it using this code

let puser =  JSON.stringify(user);

     let uArray  = puser.split(",");
     for (let element of uArray) 
     {     
       console.log("--->" + element);
     }
#15

you can check in your package.json, also did you enableWeb3 in your app before calling this?

#16

Not so sure, it looks quite complicated that you stringify it, but if it works then great :raised_hands: